Cast Enter the Infinite by paying ({8} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Hive Mind triggers, causing each opponent to copy Enter the Infinite.
Resolve the first opponent's Enter the Infinite, causing the opponent to draw cards equal to their deck size, and then put a card on top of their library.
Underworld Dreams triggers for each card the opponent draws this way, dealing 1 damage to them for each card drawn.
The opponent loses the game due to having zero or less life.